Local bone deformation at two predominant sites for stress fractures of the tibia: An in vivo study
Local bone deformation at two predominant sites for stress fractures of the tibia: An in vivo study
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DOI：
10.1177/107110079801900711
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发表时间：
1998-07-01
影响因子：
2.7
通讯作者：
Rolf, C
中科院分区：
文献类型：
--
作者：
Ekenman, I;Halvorsen, K;Rolf, C
在一名健康女性志愿者的胫骨应力性骨折的两个主要损伤部位记录了局部骨变形。在局部麻醉下，将两个装有应变计的斯台普斯插入前中段骨干（AM）和胫骨远端（PD）的后内侧部分。器械吻合钉系统的校准和可靠性先前已在体外得到证实。伴随的地面反作用力用奇石勒测力板记录。研究峰值，结果表明，在一个自愿的30厘米向前跳，PD变形是更大的前脚着陆（2700-4200微应变）比在脚跟着地着陆（1200-1900微应变），也与伴随的AM变形在上述两个测试条件（1300-1900微应变）。步行过程中的站立阶段导致PC变形为950微应变，而伴随的AM变形为334微应变。（平均2128微应变）在从45 cm高度自愿垂直跌落后的地面接触期间记录，这些数据是第一个显示不同的局部变形在不同部位的胫骨在体内。PD变形大于之前从胫骨其他部分观察到的变形，而中段骨干数据与其他报告一致。这些结果可能支持这些主要部位应力性骨折的不同病因的临床假设。
Local bone deformation was registered at two predominant injury sites for tibial stress fractures in a healthy female volunteer. Two instrumented strain gauge staples were inserted under local anesthesia to the anterior middiaphysis (AM) and to the posteromedial part of the distal tibia (PD). Calibration and reliability of the instrumented staple system have previously been demonstrated in vitro. Concomitant ground reaction forces were registered with a Kistler force plate. Studying peak values, it was shown that during a voluntary 30-cm forward jump, PD deformation was greater during forefoot landing (2700-4200 microstrain) than during a heel strike landing (1200-1900 microstrain) and also compared with the concomitant AM deformation under both above testing conditions (1300-1900 microstrain). The stance phase during walking resulted in PC deformation of 950 microstrain, whereas the concomitant AM deformation was 334 microstrain, The greatest AM deformation (mean, 2128 microstrain) was registered during ground contact after a voluntary vertical drop from a height of 45 cm, concomitant with a PD deformation of 436 microstrain.These data are the first to show different local deformations at various sites of the tibia in vivo. The PD deformation was larger than previously noted from other parts of the tibia, whereas the middiaphysis data are consistent with other reports. The results may support the clinical assumption of different etiologies for stress fractures at these predominant sites.